Alternative to long-presses / swipe gestures?

Hello,

I am trying to make my apps more accessible, and would appreciate any tips from voiceover users on how to best suit them.

I have a button that, when pressed using a short tap, behaves as normal, but when it is pressed for a long time, reveals two additional buttons.

I was wondering two things:
1 - Should VoiceOver hints announce that there are (possible) additional buttons? When, once they are deployed or when entering focus on the master button?
2 - Which gesture, if any, should I use for this? Magic Tap? How do I advertise this?

Or alternately:
3- Always display these buttons when the user uses voiceover.

Thanks!